Adjustable ladder



FIG. 1 is a perspective view of an adjustable ladder showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof, the opposite side being a mirror image;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view showing the design of FIG. 1 with the adjustable legs in an alternate position of use;

FIG. 8 is a perspective view showing the design of FIG. 1 with the adjustable legs in a second alternate position of use;

FIG. 9 is an exploded perspective view showing the design of FIG. 1 with the adjustable portion of the legs separated from the fixed legs, with the leg pins removed to show the construction order; and,

FIG. 10 is an enlarged view of the design of FIG. 1, taken from circle 10 shown in FIG. 9.

The dash-dash broken lines appearing in FIGS. 7 and 8 illustrate environmental structure of a floor and stairway, which form no part of the claimed design. The dash-dot broken lines appearing in FIGS. 9 and 10 illustrate the exploded distance between the elements, for adjustment to the ladder, which forms no part of the claimed design.

The dash-dash broken lines forming an oval in FIGS. 9 and 10 illustrate a boundary showing the enlarged portion in FIG. 10 and forms no part of the claimed design. 

CLAIM I claim the ornamental design for an adjustable ladder, as shown and described. 